What direction does the equillibrium shift when NH4HS is added?
I think that the equillibrium won't shift since we are adding a pure solid and pure solids are not included in the equillibrium expression. Just want to make sure.
You are correct as long as there is at least one molecule of NH4HS present when equilibrium is established.
You are correct! Adding a pure solid (NH4HS in this case) does not affect the equilibrium position or shift the equilibrium because the concentration of a solid does not change. In the equilibrium expression, only the concentrations of gases and aqueous substances are included. Since NH4HS is a solid, it does not appear in the equilibrium expression and therefore does not contribute to any changes in the equilibrium position.
